[Tutor] Syntactical question / OT Lisp

[Alan Gauld]

> foo.py - 
> 
> import parrot
> 
> class Bar(model.Background):
> 
>     def __initialize__(self, event):
>              #Just a pythoncard variant on init
>              self.config=self.loadCfg()
> 
> 
>    def loadCfg():
>         #get some cfg stuff, return as dict
>         return cfgDict
> 
>    def on_aBtn_mouseClick(self, event):
>          parrot.Sketch()
> 
> app=Bar(main.application)
> app.mainloop()
> 
> 
> If I wanted the function parrot.Sketch() to access that config
> dictionary, I would reference it as
> 
> foo.app.config?

You could but it would be very bad practice and much better 
to pass the object reference into Sketch.

    def on_aBtn_mouseClick(self, event):
          parrot.Sketch(self)

def Sketch(anObject):
   ....code ...
   configINfo = anObject.config

Even better make the app object return the actual config 
bits that parrot needs via a method:

def Sketch(anObject):
   ... code...
   myConfigItem1,mycOnfig2 = anObject.getSketchConfig()


All of these options make both parrot and the foo object 
more easily reusable and much less liable to break when 
you make changes to the config data.

Alan G
(Back from a week's trainig camp...)